Tool attachment device



E. A. ARP

TOOL ATTACHMENT DEVICE Re. 18,832 4 Sheets-Sheet 1 May 16, 1933.

Original Fi led Oct. 15, 19:50

E. A. ARP

May 16, 1933. I TOOL ATTASHMENT'DEVI-CE Re. 18,832

Original Filed Oct. 15, 1950 4 sheetssheet 2 F 1'9. 5 I Z6 Fig. 4.

I3, I /3 A; /2 15 4 \m!\mmnunmnmnmuMI |!l!l!l!l!l!l!|!:lzmu I 9 INVENTOEE. A. ARP

TOOL ATTACHMENT DEVICE 4 Sheets-Sheet 3 May 16, 1933.

Original Filed 001:.

E. A. ARP M I(; 193 3 TOOL ATTACHMENT DEVICE R 18 832 Original FiledOct. 15, 1930 4 4 Reissued May 16, 1 933 UNITED STATES PATENT OFFICEEWALD A. ARI, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO VAN NORMAN MACHINETOOL COMPANY, OFlSl-RINGFIELD, MASSACHUSETTS, A CORPORATION clamped tothe arm and constructed to give TOOL ATTACHMENT DEVICE Original No.1,881,993, dated October 11, 1932, Serial No. 489,004,, filed October15, 1930. Application for reissue filed November 16,

The complete device comprises the following parts: (a) a combination ofparts soarranged that they form' an extensible and adjustable arm whichis inserted into one of the cylinders of the engine block, but not intothe cylinder on which work is to be. done; (5) an extensible andadjustable engaging device rotatably attached to the above arm andarranged so that it will engage the end of the cylinder; (0) anextensible adjusting device mounted near the upper end of the arm; (d) asliding machine base securely firm support to the working or finishingtool without distortion of the cylinder upon which the work is to beperformed.

In the accompanying drawings I have illustrated a practical embodimentof this in-' vention, and the following description thereof will enableothers skilled in the art to adapt and use the invention; but I do notconsider the invention restricted to the particular form or constructionof parts shown in the drawings, as various modifications and changes maybe made by skilled mechanics or engineers while retaining the essentialnovel characteristics of the invention. Therefore, I refer to the claimsfor summaries of the essentials of the invention and novel features ofconstruction and novel combinations of parts, for all of whichprotection is desired.

In the drawings, parts which are well known are merely conventionallyillustrated. In said drawings:

1932. Serial No. 642,866.

Figurel is a side elevation of the complete device, some parts beingshown in section;

, Figure 2 is partly another side elevation of the arm (at the left) andpartly a section through the arm (at the right) Figure 3 is a plan viewof the adjusting device;

Figure 4 is partly an enlarged side elevation of the engaging device (atthe right), and partly a section through the said device (at th left)Figure 5 is an assembly view (partly sectional) of the sliding machinebase;

Figure 6 is a view of the main member of the sliding machine base; and

Figure 7 is another view of the main member ofthe sliding machine base,showing an alternative construction.

The principal part of the machine base 1, as best shown in Figures 6 and7 Sheet 4, can be such as to provide suitable means of mounting theusual portable machine units The cylinder bore engaging arm as bestshown in Figure 1, Sheet 1, and Figure 2,

Sheet 2, is fitted to a cylinder bore A in an engine block B, preferablyadjacent to the valve, stud, or cylinder bore to'be worked on. Thehinged body member 4, an enlargedview of which is shown in Figure 4, isinternally threaded to receive the externally threaded sleeves 5, thesleeves 5 having notched ends 6 for ease of adjustment; sleeves 5 arealso internally threaded to receive adjusting members 7 with cylinderengaging ends 8 and projections 9. Owing to the coarse thread on thesleeve 5 and the fine thread on the member 7, the ends 8 can be adjustedto the size of the cylinder bore. The extension member 10, Figurel,Sheet 1, and

- Figure 2, Sheet 2, is used two positions ac-' cording to the length ofthe cylinder bore, one position as shown, and one may be obtained byloosening the screw 11 allowlngthe plates 12 to be removed from theP1118 13 which are permanently secured in member 10 member 10 shown onFigure 2,' Sheet 2, can now be moved so that pins 13 enter the holes 14in the plates 12. The body member 4 of the engagement device is providedwith pairs of holes 16, and the hinge pins 16 in the plates 12 can beinserted into any corresponding pair to form an offset of member 10 inrelation to the'axial line of thecylinder bore. The extension member 10is internally threaded to receive a screw 17, which is provided with anattachment head 18: screw 17 also carries the adjustment device, Figure3, Sheet 2, having a body block 21, adjustable to maintain the partsdescribed in position in the cylinder bore as follows. lThe head 18 isgrasped and the hinged member 4 swinging on the rivets 16 passes throughthe cvlinder bore as indiby the full lines.

cated by the dotted line 19, Figure 1, Sheet 1, allowing the cylinderengaging projections 9 to engage the end of a cylinderbore as shown Theattachment head 18 is adjusted to project the proper amount above thecylinder block B and the parts in the adjustment device Figure 3, Sheet2, are adjusted by turning the body block 21 on the screw 17 'to bebelow the surface of the cylinder bore. The knurled wheels 25 are nowturned, causing adjustment screws 24 to move outwardly until tips 26,which are preferably madeof fibrous material, come into engaging contactwith the cylinder bore, screws 24 being kept from turning by keys 22which actin keyways 23. The attachment head 18 is thus adjusted to anyvertical position above the, cylinder block.

The machine base 1 is placed in position for the work to be done, theattachment head 18 projecting into the opening formed by the inwardlyproject ng edges 27, the pressure member 28 as best shown vin Figure 5,Sheet 3, isvmoved into the opening in'base 1, the

fingers-29 coming to rest on the inner end of edges'27, and the outerend 30 of the pressure member 28 hanging on the thread of screw 31supported by its attached collar 32 on the bridge member 33, theabutments 34 of the bridge member 33 resting on the outer end of theedges 27 of the base 1. The two inwardly projecting edges 36 of theopening in the pressure member 28 pass under the attachment head 18, andby turning the cross bar 37 fastened in screw 31 the end 30 of pressuremember 28 is raised, causing a downward pressure on the abutments 34 andthe fingers 29 by the lifting action of the screw 31 on the attachmenthead 18, resulting in a three-point pressure, which is transmitted bymember 28 to the base lat four-points, causing the firm attachment ofbase 1 to its work without distortions.

The foregoing has made it clear the opening 35 with its edges 36 inpressure member 28 together with the shifting action provlded for theattachment head 18 allowing it to be positioned at different points inrelation to the axial line of a cylinder bore, is the provisionalconstruction to allow base 1 to be positioned properly for any desiredoperation; also, no extra provisions for attaching base 1 need beconsidered and the entire surface 38 adjacent to the mounted portabletool mechanism is left free and clear for the mounting of drive motors,centering devices, 'controls, etc., at a low and balanced point, suchmounting being effected either by means of screw thread 3, Figure 6, orby means of studs-2, Figure 7. The actual attaching is accomplished at apoint .under this surface 38 by the action of the screw 31 at apoint-accessible.

Having thus described my invention, 1 claim as new, and desire to coverby Letters Patent:

1.; A device for securing a tool to a multicylinder engine block,comprising a base adapted to rest upon the engine block and having amounting for a tool, an anchor securablewithin a cylinder other than theone being worked upon, a pressure member having pivotal engagementintermediate its length with the anchor and having two-point with atwo-point contact upon the base, and

means to draw the second end of the pressure member towards the bridgeto press the bridge and the opposite end of the pressure membersimultaneously against the base.

2. A device fgr securing a tool to a multicylinder engine blockcomprising a base adapted to rest upon the engine block and having amounting for a'tool, a member expansible within a cylinder other thanthe one being worked upon and having one or more projections engageablebeneath the end of the cylinder wall to resist an upward pull, a headedanchor adjustably secured to said member so as to project above thetopof the cylinder block, a slotted pressure member having ledgesfitting under the anchor head to form a pivotal engagement therewith intermediate the length of the pressure member, said pressure memberhaving two-point engagement at one end with the base adjacent the toolmounting, a bridge straddling the} bridge and the opposite end of thepressuremember simultaneously against the base.

. ,3. A device for securing a tool to a multi-' cylinder engine block orthe like comprising an arm adapted to be passed through a cylinder bore,a member pivotally mounted at one mote from said member and thereby tosteady the arm, and a member carried by the arm in position to begrasped by the tool mountfing.

4. A-device for securing a tool in operative relation to amulti-cylinder engine block and the like comprising an arm'adapted topass through a cylinder other than the one being worked on, a memberpivotally mounted at one end of the arm, a pair of abut- -ments carriedby the member and adjustable to the diameter of the cylinder wall nearone end, lugs carried by said member adapted to engage under the end ofthe cylinder wall, said member with the lugs thereon being adapted topass freely through the cylinder when it is tilted on its pivot, ananchoring device adjustably mounted on the arm and adapted to be engagedby a tool mounting, and a support having a plurality of adjustablecylinder wall engaging abutments associated with the anchoring device toTfeady it and align it within the cylinder wa 5. In a machine forreboring the cylinders of internal combustion motors and the like, atool carrying base adapted to be placed upon the cylinder block to bringthe tool into alinement with the cylinder to be rebored, a memberpassable through a cylinder other than the one to be rebored andcarryingan anchor by which said member may be secured against motion in saidcylinder in the direction of the cylinders axis, a head on the end ofthe member'remote from the anchor and'positioned above the top of thecylinder block, a device independent of the anchor for supporting themember in the cylinder, a lever having an open ended slot slidablelaterally into pivotal connection with the member beneath the headthereon and bearing on the tool carrying base adjacent the cylinder tobe rebored, and means positioned to engage the lever on the side of saidmember remote from the cylinder to be ,rebored to rock the lever aboutits point of pivotal engagement and thereby to cause it to clam the baseto the cylinder block in the region adjacent the cylinderto be re bored.

6. In a machine for reboring the cylinders of internal combustion motorsand the like, a tool carrying base adapted to be placed upontheicylinder block to bring the tool into alignment with the cylinder tobe rebored,

amember passable through a cylinder other than the one to be rebored andcarrying an anchor by which said member may be se-' cured against upwardmotion in said cylin der, a device operable to limit the move ment ofthe upper end of the member relative to the cylinder, a head located onthe upper movable laterally into operative engagement with the memberbeneath its head while the head is' so held in position, and mechanismfor exerting a leverage between said slide and the base to cause thebase to be pressed firmly against the cylinder block.

' EWALD A. ARP.

